package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadpool = Executors.newFixedThreadPool(3);
        for (int i = 0;i<5;i++){
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    Thread t = Thread.currentThread();
                    System.out.println(t+"正在执行任务");
                    try {
                        Thread.sleep(3000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(t+"执行任务完毕");
                }
            };
            threadpool.execute(r);
            System.out.println("将一个任务交给了线程池");

        }
        //threadpool.shutdown();
        threadpool.shutdownNow();
        System.out.println("线程池关闭");
    }
}
